Police spokeswoman Lisa Cox says the department’s Special Victims Unit is investigating three of the incidents. She says the investigating into a fourth incident has been suspended because of a lack of cooperation.

Cox says in the remaining cases, the alleged suspects and victims knew one another, and there’s no obvious link between any of the cases.

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At rally for trans woman killed by police, protesters struck by vehicle

A vehicle drove into a crowd of protesters in St. Louis during a rally for Kiwi Herring, a black transgender woman who was killed by St. Louis police earlier this week. Police reported three suffered minor injuries from the vehicle. The driver was taken into custody.